Flash
Flying, vigilance
When Archangel Avacyn enters the battlefield, creatures you control gain indestructible until end of turn.
When a non-Angel creature you control dies, transform Archangel Avacyn at the beginning of the next upkeep.

, Pay 2 life: Draw a card.
At the beginning of your upkeep, if you have 5 or less life, you may transform Arguel's Blood Fast.

[+1]: Until end of turn, up to one target creature gets +2/+2 and gains vigilance and haste.
[0]: Create a 2/2 green Wolf creature token. Transform Arlinn Kord.

[+1]: Creatures you control get +1/+1 and gain trample until end of turn.
[−1]: Arlinn, Embraced by the Moon deals 3 damage to any target. Transform Arlinn, Embraced by the Moon.
[−6]: You get an emblem with "Creatures you control have haste and ': This creature deals damage equal to its power to any target.'"

Flying
When this creature transforms into Avacyn, the Purifier, it deals 3 damage to each other creature and each opponent.

Flying
: Create a 2/2 black Vampire creature token with flying.
: Transform Bloodline Keeper. Activate this ability only if you control five or more Vampires.

Flying, first strike, vigilance, lifelink
Your opponents can't cast spells with converted mana cost 3 or less.

When you cast this spell, you may return target Angel or Human creature card from your graveyard to the battlefield.
Flying, vigilance
(Melds with Gisela, the Broken Blade.)

Whenever you cast a red spell, untap Chandra, Fire of Kaladesh.
: Chandra, Fire of Kaladesh deals 1 damage to target player or planeswalker. If Chandra has dealt 3 or more damage this turn, exile her, then return her to the battlefield transformed under her owner's control.

[+1]: Chandra, Roaring Flame deals 2 damage to target player or planeswalker.
[−2]: Chandra, Roaring Flame deals 2 damage to target creature.
[−7]: Chandra, Roaring Flame deals 6 damage to each opponent. Each player dealt damage this way gets an emblem with "At the beginning of your upkeep, this emblem deals 3 damage to you."

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.

Equipped creature gets +1/+0.
When equipped creature deals combat damage to a player, unattach Elbrus, the Binding Blade, then transform it.
Equip

When Garruk Relentless has two or fewer loyalty counters on him, transform him.
[0]: Garruk Relentless deals 3 damage to target creature. That creature deals damage equal to its power to him.
[0]: Create a 2/2 green Wolf creature token.

[+1]: Create a 1/1 black Wolf creature token with deathtouch.
[−1]: Sacrifice a creature. If you do, search your library for a creature card, reveal it, put it into your hand, then shuffle your library.
[−3]: Creatures you control gain trample and get +X/+X until end of turn, where X is the number of creature cards in your graveyard.

[+2]: Up to one target creature an opponent controls attacks Gideon, Battle-Forged during its controller's next turn if able.
[+1]: Until your next turn, target creature gains indestructible. Untap that creature.
[0]: Until end of turn, Gideon, Battle-Forged becomes a 4/4 Human Soldier creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn.

Flying, first strike, lifelink
At the beginning of your end step, if you both own and control Gisela, the Broken Blade and a creature named Bruna, the Fading Light, exile them, then meld them into Brisela, Voice of Nightmares.

Whenever this creature enters the battlefield or transforms into Huntmaster of the Fells, create a 2/2 green Wolf creature token and you gain 2 life.
At the beginning of each upkeep, if no spells were cast last turn, transform Huntmaster of the Fells.

Flying

[+1]: Up to one target creature gets -2/-0 until your next turn.
[−3]: You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard this turn, exile it instead.
[−9]: You get an emblem with "Whenever you cast a spell, target opponent mills five cards."

: Draw a card, then discard a card. If there are five or more cards in your graveyard, exile Jace, Vryn's Prodigy, then return him to the battlefield transformed under his owner's control.